Unless your answer is either Leeming, Wittering or Waddington then might I suggest you do not actually have the answer!
I don’t think the MOD or indeed the title of the thread ever suggested a new location was going to come from anywhere other than the three shortlisted options.
We all know there are dozens of deactivated airfields across the UK but I seriously doubt anyone in the MOD is looking to reactivate any of them.
Maybe, if we must speculate, it would be better to discuss which of the three actual possibilities are most likely?!
BV